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Recent questions in 12th Science Maharashtra Board

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In an ionic crystalline solid atoms of element Y form hcp lattice.
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Cu crystallizes in fcc unit cell with edge length of 495 pm.
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What are the consequences of Schottky defect?
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What are paramagnetic substances? Give examples.
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Calculate the packing efficiency of metal crystal that has simple cubic structure.
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Calculate the number of atoms in fcc unit cell.
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Distinguish between ionic solids and molecular solids.
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What are valence band and conduction band?
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What are ferromagnetic substances?
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Mention two properties that are common to both hcp and ccp lattices.
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How does electrical conductivity of a semiconductor change with temperature? Why?
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What is the unit cell?
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